function isNumber(val) {
    var regNum=new RegExp('^[0-9]+.{0,1}[0-9]*$');
    return regNum.test(val) ;
}
function isInteger(val) {
    var regNum=new RegExp('^[0-9]*$');
    return regNum.test(val) ;
}
/**
 * 检测起订量
 * Created by 2018-06-26 09:15 fxLDJ
 * param   model,num,type//参数类型，0为检查，1为加，2为减去
 * return
 */
function checkStartAmount(model,num,type,showMsg) {
    if(null==showMsg){
        showMsg = true ;
    }
    num = parseFloat(num) ;
    if(num<0 && type ==0){
        if(showMsg) {
            wx.showToast({
                title: '数量不能是负',
                icon: 'success',
                duration: 1000
            });
        }
        return false ;
    }
    var startAmount = model.startAmount;
    var checkFlag = true ;
    if(null!=startAmount
        && ""!=startAmount
        && startAmount>0
        && ((type ==1 && startAmount>num) || (type ==2 && startAmount>=num) || (type ==0 && num>0 && startAmount>num ))){
        if(showMsg) {
            wx.showToast({
                title: '起订量' + startAmount,
                icon: 'success',
                duration: 1000
            });
        }
        checkFlag = false ;
    }else{
        checkFlag = true ;
    }
    switch (type){

        case 0:// 检查 [Created by 2018-06-26 09:17 fxLDJ]
            return checkFlag ;
            break ;
        case 1:// 加 [Created by 2018-06-26 09:24 fxLDJ]
            return checkFlag?num+1:startAmount ;
            break ;
        case 2:// 减 [Created by 2018-06-26 09:25 fxLDJ]
            return checkFlag?num-1:0 ;
            break;
    }
}
// 验证是否手机号码 [Created by 2018-06-29 09:40 fxLDJ]
function isPhone(val) {
    var regNum=new RegExp('^1[3-9][0-9]{9}$');
    return regNum.test(val) ;
}
//身份证号合法性验证 
//支持15位和18位身份证号
//支持地址编码、出生日期、校验位验证
function cardNoValid(code) {
  var city = { 11: "北京", 12: "天津", 13: "河北", 14: "山西", 15: "内蒙古", 21: "辽宁", 22: "吉林", 23: "黑龙江 ", 31: "上海", 32: "江苏", 33: "浙江", 34: "安徽", 35: "福建", 36: "江西", 37: "山东", 41: "河南", 42: "湖北 ", 43: "湖南", 44: "广东", 45: "广西", 46: "海南", 50: "重庆", 51: "四川", 52: "贵州", 53: "云南", 54: "西藏 ", 61: "陕西", 62: "甘肃", 63: "青海", 64: "宁夏", 65: "新疆", 71: "台湾", 81: "香港", 82: "澳门", 91: "国外 " };
  var tip = "";
  var pass = true;

  if (!code || !/^\d{6}(18|19|20)?\d{2}(0[1-9]|1[012])(0[1-9]|[12]\d|3[01])\d{3}(\d|X)$/i.test(code)) {
    tip = "身份证号格式错误";
    pass = false;
  }

  else if (!city[code.substr(0, 2)]) {
    tip = "地址编码错误";
    pass = false;
  }
  else {
    //18位身份证需要验证最后一位校验位
    if (code.length == 18) {
      code = code.split('');
      //∑(ai×Wi)(mod 11)
      //加权因子
      var factor = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2];
      //校验位
      var parity = [1, 0, 'X', 9, 8, 7, 6, 5, 4, 3, 2];
      var sum = 0;
      var ai = 0;
      var wi = 0;
      for (var i = 0; i < 17; i++) {
        ai = code[i];
        wi = factor[i];
        sum += ai * wi;
      }
      var last = parity[sum % 11];
      if (parity[sum % 11] != code[17]) {
        tip = "校验位错误";
        pass = false;
      }
    }
  }
  // if (!pass) alert(tip);
  return pass;
}
function isEmpty(val){
    if(null==val || val.toString().replace(/^ *$/,"")==""){
        return true ;
    }
    return false ;
}

module.exports = {
    isNumber: isNumber,
    isEmpty: isEmpty,
    isInteger: isInteger,
    checkStartAmount: checkStartAmount,
    isPhone: isPhone,
    cardNoValid: cardNoValid
}
